[INFO] cloning repository https://github.com/anshulrgoyal/bust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anshulrgoyal/bust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cf6a3ce3426125da2e0e9e93cc7eb6ba2704e5c6
[INFO] checking anshulrgoyal/bust against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anshulrgoyal/bust on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anshulrgoyal/bust
[INFO] finished tweaking git repo https://github.com/anshulrgoyal/bust
[INFO] tweaked toml for git repo https://github.com/anshulrgoyal/bust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/anshulrgoyal/bust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argh v0.1.8
[INFO] [stderr]   Downloaded argh_shared v0.1.8
[INFO] [stderr]   Downloaded strum v0.8.0
[INFO] [stderr]   Downloaded strum_macros v0.8.0
[INFO] [stderr]   Downloaded spinners v1.2.0
[INFO] [stderr]   Downloaded enum-as-inner v0.3.4
[INFO] [stderr]   Downloaded argh_derive v0.1.8
[INFO] [stderr]   Downloaded ansi_term v0.7.5
[INFO] [stderr]   Downloaded spinner v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e263e78893f0c20850b5db53e1df829de5918d3370a957d8e3cbf35421d5337c
[INFO] running `Command { std: "docker" "start" "-a" "e263e78893f0c20850b5db53e1df829de5918d3370a957d8e3cbf35421d5337c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e263e78893f0c20850b5db53e1df829de5918d3370a957d8e3cbf35421d5337c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e263e78893f0c20850b5db53e1df829de5918d3370a957d8e3cbf35421d5337c", kill_on_drop: false }`
[INFO] [stdout] e263e78893f0c20850b5db53e1df829de5918d3370a957d8e3cbf35421d5337c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f59b3458f9e081227e887a4b272f1aec1c8200ed9971069774619f394e145e65
[INFO] running `Command { std: "docker" "start" "-a" "f59b3458f9e081227e887a4b272f1aec1c8200ed9971069774619f394e145e65", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling futures-core v0.3.23
[INFO] [stderr]    Compiling futures-channel v0.3.23
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking futures-sink v0.3.23
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling async-trait v0.1.57
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking openssl-sys v0.9.75
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling argh_shared v0.1.8
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]    Compiling anyhow v1.0.62
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking resolv-conf v0.7.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking spinner v0.5.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking strum v0.8.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking spinners v1.2.0
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]    Compiling futures-macro v0.3.23
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]    Compiling enum-as-inner v0.3.4
[INFO] [stderr]    Compiling argh_derive v0.1.8
[INFO] [stderr]     Checking openssl v0.10.41
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking futures-util v0.3.23
[INFO] [stderr]     Checking argh v0.1.8
[INFO] [stderr]     Checking native-tls v0.2.10
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.23
[INFO] [stderr]     Checking futures v0.3.23
[INFO] [stderr]     Checking trust-dns-proto v0.19.7
[INFO] [stderr]     Checking trust-dns-resolver v0.19.7
[INFO] [stderr]     Checking bust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 41.74s
[INFO] running `Command { std: "docker" "inspect" "f59b3458f9e081227e887a4b272f1aec1c8200ed9971069774619f394e145e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f59b3458f9e081227e887a4b272f1aec1c8200ed9971069774619f394e145e65", kill_on_drop: false }`
[INFO] [stdout] f59b3458f9e081227e887a4b272f1aec1c8200ed9971069774619f394e145e65
[INFO] checking anshulrgoyal/bust against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anshulrgoyal/bust on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/anshulrgoyal/bust
[INFO] finished tweaking git repo https://github.com/anshulrgoyal/bust
[INFO] tweaked toml for git repo https://github.com/anshulrgoyal/bust written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/anshulrgoyal/bust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb82de2ae9f69860f3ab6217de08a8eaeace2825ae1cc47bd92f9f8beaa02ab0
[INFO] running `Command { std: "docker" "start" "-a" "cb82de2ae9f69860f3ab6217de08a8eaeace2825ae1cc47bd92f9f8beaa02ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb82de2ae9f69860f3ab6217de08a8eaeace2825ae1cc47bd92f9f8beaa02ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb82de2ae9f69860f3ab6217de08a8eaeace2825ae1cc47bd92f9f8beaa02ab0", kill_on_drop: false }`
[INFO] [stdout] cb82de2ae9f69860f3ab6217de08a8eaeace2825ae1cc47bd92f9f8beaa02ab0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e3221f47e8eb54e69935568e46e7220ac14d1ec06e78d95ad7cd79da4d52aec
[INFO] running `Command { std: "docker" "start" "-a" "7e3221f47e8eb54e69935568e46e7220ac14d1ec06e78d95ad7cd79da4d52aec", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling futures-core v0.3.23
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling futures-channel v0.3.23
[INFO] [stderr]     Checking futures-sink v0.3.23
[INFO] [stderr]    Compiling serde v1.0.143
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]    Compiling async-trait v0.1.57
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]    Compiling unicode-segmentation v1.9.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking openssl-sys v0.9.75
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking match_cfg v0.1.0
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]    Compiling mime_guess v2.0.4
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling argh_shared v0.1.8
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]    Compiling anyhow v1.0.62
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking spinner v0.5.0
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]     Checking resolv-conf v0.7.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking strum v0.8.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]     Checking spinners v1.2.0
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]    Compiling futures-macro v0.3.23
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]    Compiling openssl-macros v0.1.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]    Compiling enum-as-inner v0.3.4
[INFO] [stderr]    Compiling argh_derive v0.1.8
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking openssl v0.10.41
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking argh v0.1.8
[INFO] [stderr]     Checking futures-util v0.3.23
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking native-tls v0.2.10
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking futures-executor v0.3.23
[INFO] [stderr]     Checking futures v0.3.23
[INFO] [stderr]     Checking trust-dns-proto v0.19.7
[INFO] [stderr]     Checking trust-dns-resolver v0.19.7
[INFO] [stderr]     Checking bust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 41.60s
[INFO] running `Command { std: "docker" "inspect" "7e3221f47e8eb54e69935568e46e7220ac14d1ec06e78d95ad7cd79da4d52aec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e3221f47e8eb54e69935568e46e7220ac14d1ec06e78d95ad7cd79da4d52aec", kill_on_drop: false }`
[INFO] [stdout] 7e3221f47e8eb54e69935568e46e7220ac14d1ec06e78d95ad7cd79da4d52aec